Small data dump.
Fuel pickups.
Most cells come with "duck bill" pickups in them. They aren't great and usually start to starve for fuel with a couple gallons left, sometimes more. There are two main options used right now to get around this.
1. The new Holly Hydramat. Works amazingly well, but realize that it will give you zero warning that you are low, you will simple stop getting fuel.
2. A system that uses the walbro puck style pickups. For example I have a system that uses 4 of these, one in each corner. They work great, I have run the cell to within a gallon of empty in the past.
Pumps. You can run an external or internal.
External - make sure to mount the pump below or at the bottom level of the fuel cell. That way gravity helps feed your pump and it lives longer. Run an AN line to the top plate of the cell and inside connect to your pickup style of choice. There are a few universal in-line pumps out there (walbro 255, Bosh 044, etc). Or for a cheap alternative, get a pump for a 1989 Ford E series van with the straight 6. It's an inline almost identical to those others, but for less money.
Internal - you have a couple options.
1. A simple pump hooked up to one of the pickup options mentioned above mounted low in the tank.
2. A simple trap door style surge tank mounted low in the cell with the pump pushing out
3. A complex surge tank that uses a low pressure pump to pull from some pickup setup from above that fills the surge tank where a high pressure pump sits and pushes out.
Of those an external pump is the cheapest.
You may not have anything outside the cell that might look like another tank. So no external surge tanks. If you want one it must live inside the cell.
Plumbing is easy. Decide on your pump setup. On the top of the cell you will have 3 lines connected.
1. Fuel supply. This will connect to your main OEM fuel supply line. You can use a very short section of soft fuel injection hose, you can put a flare to AN fitting on the OEM hardline, or find another method of adapting.
2. Fuel return. This should just be attached to your OEM return line from the fuel rail.
3. Vent tube. A long tube that comes out of the cell, raises above it and makes several loops, and then goes down and ends below the bottom level of the cell. This allows the cell to vent, but stops it from siphoning gas out if you roll over.
Hope some of that helps.
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